This superb museum was once home to Milan's huge design culture event, held every three years. Now its vast collection of chairs, Olivetti typewriters and other design masterpieces are revolved every six months in a funky, open-plan showroom, flanked by exhibits in an outdoor atrium.At least two major design-themed temporary exhibitions are held in the Palazzo d'Arte at any one time. At the time of writing, a junk-house building installation, an extravaganza of Australian home design and a show by Cassina, the celebrated Milanese furniture company, were all in full swing. Even non-art lovers will enjoy browsing the books in the excellent ground-floor bookshop. The DESIGN café next door has a proud jumble of designer chairs, and dishes up tea and cakes to an arty mob, all peering at their purchases through D&G glasses.